How does Inbox Ninja keep my emails private?

Inbox Ninja runs locally on your Mac. Your emails never leave your device - only the specific content you're working with is processed. OAuth connection to Gmail can be revoked anytime.

Will replies sound like me?

Yes. Inbox Ninja learns your communication style from past emails. Draft replies match your tone, formality level, and typical response patterns.

Does it work with Google Workspace?

Yes. Works with personal Gmail and Google Workspace accounts. Same OAuth flow, same privacy guarantees.

How is this different from Gmail's smart compose?

Gmail suggests sentence completions. Inbox Ninja writes full contextual replies, summarizes long threads, and triages your entire inbox to surface what matters. It's the difference between autocomplete and an assistant.

Inbox Ninja

AI email assistantthat drafts in your voice

The average professional spends 28% of their workweek on email—over 11 hours weekly sorting, reading, and responding. Inbox Ninja is an AI email assistant for Gmail that triages what matters, summarizes long threads, and writes draft replies in your voice. Stop managing email. Start making decisions.

Open Inbox Ninja See how it works

Available onRush

One click OAuth connectionNo passwords sharedRevoke anytime

Example

Decision brief + draft

Thread summary

THREAD SUMMARY (2m read)

• From: Jordan @ Acme
• Topic: Q2 renewal + security review

DECISIONS
- You’ll send the updated pricing sheet by EOD Wed
- Acme will confirm seat count by Fri

OPEN QUESTIONS
- Do they need SSO on day 1?
- Can legal use last year’s DPA template?

NEXT ACTION
- Reply confirming timeline + ask for seat count + SSO requirement

Voice-matched draft

DRAFT REPLY

Hey Jordan — thanks.

Yes, we can get you the updated pricing sheet by EOD Wednesday.
Can you confirm the seat count you’re planning for Q2 by Friday?

Also quick check: do you need SSO on day 1, and is legal OK reusing last year’s DPA template?

— Muqsit

Claude

OAuth 2.0 - no password access

No email storage on our servers

We never train on your data

Integrations

Works with your inbox

Connect in one click. No passwords shared. Revoke anytime.

Gmail

Google Workspace

Slack

How it works

Inbox zero in 3 steps

Unlike generic AI email tools, Inbox Ninja learns your specific writing style and provides decision-focused summaries—not just text compression.

01Step

Connect your Gmail

Secure OAuth 2.0 connection through Google. No passwords shared. Your credentials never touch our servers. Revoke access anytime from Google Account settings.

02Step

AI learns your voice

Inbox Ninja analyzes your last 15 sent emails to learn your writing style, greeting patterns, sign-off, and formality level. Powered by Claude from Anthropic.

03Step

Triage, summarize, draft

Ask Inbox Ninja to triage your inbox. Get decision-focused summaries of long threads. Generate reply drafts that match your tone. Send or save as Gmail draft.

Proof

Don't imagine what the output might look like. Judge the work.

Most AI email tools describe benefits in abstract terms. What matters is whether the summary is actually useful and whether the draft sounds like a person you would trust to hit send.

Raw thread

Jordan — Acme Procurement

We're trying to finalize the renewal this week. Legal is asking whether your team can reuse last year's DPA language, and IT wants to know if SSO is required at launch or if it can wait until phase two. Also can you resend the pricing sheet with the updated seat ranges? We need to lock budget before Friday.

Avery — Internal note

We can send pricing Wednesday. SSO can wait if they're okay starting with Google auth. Legal said last year's DPA is probably fine but wants Acme to confirm no procurement redlines first.

What you would normally do

Re-read the thread, scan old messages for commitments, draft a reply from scratch, then double-check you didn't miss the actual decision points.

Inbox Ninja summary

Decision brief

Topic: Acme renewal, pricing sheet, security requirements
Need to send: updated pricing sheet by Wednesday EOD
Open question: does Acme require SSO on day 1 or can it wait until phase two?
Legal risk: last year's DPA is likely reusable if Acme confirms no procurement redlines
Next action: reply with timing, ask for seat count confirmation, and confirm SSO requirement

Inbox Ninja draft

Hey Jordan — thanks, this all makes sense. We can get you the updated pricing sheet by EOD Wednesday. Two quick checks so we keep everything moving: 1. Can you confirm the seat count range you want priced for Q2? 2. Do you need SSO live on day 1, or is phase two acceptable if Google auth is available at launch? On the legal side, we should be able to reuse last year’s DPA as long as procurement isn’t planning redlines. If that changes, send them over and we’ll review quickly. — Muqsit

What this proves

The summary doesn't just compress text. It extracts decisions, blockers, and the exact next move.

What this avoids

Generic AI fluff, missing context, and drafts that sound polished but don't actually answer the email.

Why it matters

The point is not writing faster in the abstract. It's cutting the cognitive load between opening a thread and knowing what to do next.

See it in action

Real outputs, not demos

Inbox Ninja doesn't just compress text. It extracts decisions, learns your voice, and writes drafts that sound like you—not generic AI.

Context-Aware Draft

Replying to a client asking for a project timeline extension

Email Artifact

Subject: Re: Project Timeline

Hi Sarah,

Thanks for flagging this early. I took a look at the scope changes you mentioned and I think a two-week extension is reasonable given the additional API integrations.

Let's sync briefly tomorrow—say 2pm? I want to make sure we're aligned on priorities so we don't end up pushing again.

Best,
Alex

Voice match: 94%Calendar aware

Every output is tailored to your voice, your context, and your relationships.

Benefits

Email control that matches your pace

Global interest in inbox zero has grown 50% year-over-year. Inbox Ninja helps professionals reclaim hours weekly by prioritizing what matters and removing noise—without losing your voice or context.

Decision clarity

Summaries surface decisions, commitments, and open questions so you can act fast, not reread threads.

Voice fidelity

Learns from your sent emails to draft responses that feel like you, even under pressure.

Follow-up discipline

Track who owes you, who you owe, and which threads are stalling without spreadsheets.

Calendar awareness

Flags meeting conflicts and surfaces scheduling context hidden inside long threads.

Use cases

Built for real inbox pressure

Founder with 200+ Unread

Instant triage: know the 5 emails that actually need you today - the rest handled or categorized in seconds

Consultant Juggling Clients

50-message thread summarized to 3 bullet points with the one decision you need to make - plus draft reply in your voice

Manager Who Misses Things

Surface the hidden 'can you...?' buried in paragraph 3 of that wall-of-text email - automatic action item extraction

Anyone Who Hates "Just Following Up"

Know exactly what's pending without maintaining spreadsheets - who owes you, who you owe, what's going stale

Comparison

How Inbox Ninja compares to Gmail Gemini AI

Gmail's built-in AI (Gemini) offers basic assistance. Inbox Ninja provides the depth executives need.

Gmail AI

One-sentence thread summaries

Generic suggested replies (3 options)

Single-email focus

No calendar integration

Inbox Ninja

Decision extraction: who committed to what, open questions, action items

Voice-matched drafts learned from your last 15 sent emails

Cross-thread follow-up tracking across entire inbox

Meeting-aware with Google Calendar conflict detection

Features

Built for speed and precision

Smart triage

AI identifies what needs attention now, what can wait, and the action items hidden in long emails.

Decision-grade summaries

Thread summaries capture decisions, commitments, and open questions so you can respond with confidence.

Contextual drafts

Replies are drafted in your voice using your sent emails so the tone always matches.

Follow-up tracking

See pending replies and aging threads across the inbox without maintaining a separate tracker.

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FAQ

Answers for busy inbox owners

How does it write replies that sound like me?Answer

On first use, Inbox Ninja silently reads your last 15 sent emails to learn your voice - your greeting style, sign-off, formality level, how you structure responses. The draft it writes sounds like you wrote it at 2am, not like ChatGPT.

What if I don't want it reading all my emails?Answer

It only reads emails when you ask it to triage or summarize. There's no background scanning. We don't store email content on our servers or train on your data. OAuth connection can be revoked anytime.

Can it actually send emails or just draft them?Answer

Both. One-click send for drafts you approve, or save as Gmail draft to review later. You're always in control of what goes out.

How is thread summarization different from Gmail's AI?Answer

Gmail gives you a sentence. Inbox Ninja extracts the actual decisions made, who committed to what, and what questions are still open. It understands the thread as a conversation, not just text.

Does it integrate with my calendar?Answer

Yes. It knows when meetings are scheduled and can flag emails about upcoming meetings, suggest times for responses, and surface scheduling conflicts buried in threads.

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